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1、TheDesignofSnowboardHalfpipeAbstract:Basedonthesnowboardmovementtheory,theflightheightdependsontheout-velocity.Wetakethetechnicalparametersoffoursitesandfiveexcellentsnowboardersforstatisticalanalysis.Asresultsshowthatthesizeofhalfpipe(length,widthanddepth,halfpipeslope
2、)influencethein-velocityandout-velocity.Helpramp,theanglebetweenthesnowboard'sdirectionandspeedaffectvelocity'sloss.Forthehalfpipe,weestablishedthedifferentialequationmodel,basedonweight,friction,airdensity,resistancecoefficient,theareaofresistance,andotherfactorsandthe
3、lawofenergyconservation.themodel9sresultsshowthatthesnowboarders9energylosefromfouraspects(1)theanglebetweenthedirectionofsnowboardandthespeed,whichformedbecauseoftheexistinghalfpipe(2)Thefrictionbetweensnowboardandthesurface(3)theairbarrier(4)thecollisionwiththewallfor
4、gettingverticalspeedbeforeslipingoutofhalfpipe.Therefore,weputforwardanimprovingmodelcalledL-halfpipe,soastoeliminateorreducetheanglebetweenthesnowboardandthespeed.Smallerradiuscanalsoreducetheenergyabsorptionbythewall.Atlast,weputforwardsomeconceptiontooptimizethedesig
5、nofthehalfpipeintheperspectiveofsafetyandproducingtorsion.Keywords:snowboard;halfpipe;differentialequationmodel;L-halfpipeContents1.Introduction3簡(jiǎn)介1.1theoriginofthesnowboardcourseproblems3滑雪課程的起源問題。1?2thebackground3背景2?TheDescriptionofProblem3問題的描述2.1Practicalhalfpipe's
6、requirements3實(shí)用halfpipe的需求2.1.1themaximumverticalandthelargestbodytwist3最大垂宜和最大的身體扭曲2.1.2Speedanalysis3速度分析2.2Halfpipe'sownconditions4HalfpipeH身的條件2.2.1Friction4摩擦2.2.2thesizeofhalfpipe4halfpipe的大小3?Model4模型3.1DefinitionsandSymbols4定義和符號(hào)3.2Assumptions5假設(shè)3.3thesimpleanal
7、ysisofgravityandfrictionwhenslidinginthehalfpipe5簡(jiǎn)單的分析重力和摩擦力的halfpipe時(shí)滑動(dòng)3.4in-velocityoffactors6速度的因素3.4.1thesnowboarder5anglewheninandthespeedloss6滑雪在角和速度上的損失3.5out-velocityoffactors8初速度的因素3.5.1Helpramp8幫助坡道3.5.2theforcepointandtheplateanglewhenout9力的點(diǎn)和板和3.5.3thesnowbo
8、arder9anglewhenoutandthespeedloss9滑雪在角和速度上的損失3.5.1Halfpipe'sRadius11Halfpipe的半徑3.1thein-velocitycomparisonwith
